Molybdenum (II) bromide

Crystal structure
	__ Mon 2+ __ Br -
General
Surname	Molybdenum (II) bromide
Ratio formula	MoBr 2
Brief description	yellow red solid
External identifiers / databases
PubChem	144025
ChemSpider	127051
Wikidata	Q4096882
properties
Molar mass	225.75 g mol −1
Physical state	firmly
density	4.88 g cm −3
Melting point	700 ° C (decomposition)
solubility	almost insoluble in water
safety instructions
GHS hazard labeling ; no classification available
GHS hazard labeling ; no classification available
	As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions .

Molybdenum (II) bromide is an inorganic chemical compound of molybdenum from the group of bromides .

Extraction and presentation

Molybdenum (II) bromide can be obtained by reacting molybdenum (II) chloride with lithium bromide .

{\ displaystyle \ mathrm {[Mo_ {6} Cl_ {8}] Cl_ {4} +12 \ LiBr \ longrightarrow [Mo_ {6} Br_ {8}] Br_ {4} +12 \ LiCl}}

Also possible is the preparation by reaction of molybdenum with a bromine - nitrogen mixture at 680 ° C or by disproportionation of molybdenum (III) bromide in vacuum at 600 ° C.

properties

Molybdenum (II) bromide is a diamagnetic , hygroscopic , yellow-red to brown powder that is insoluble in water and acids. It is soluble in hot, concentrated sulfuric acid or in warm, dilute, strong bases (with concentrated bases it decomposes). The addition of hydrochloric acid or hydrobromic acid to the alkaline solution leads to the mixed halides [Mo ₆ Br ₈ ] Cl ₄ or [Mo ₆ Br ₈ ] I ₄ . The crystal structure of molybdenum (II) bromide is isotypic to that of molybdenum (II) chloride.

Individual evidence

↑ ^a ^b ^c ^d Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . Taylor & Francis, 2011, ISBN 1-4398-1462-7 , pp. 279 ( limited preview in Google Book search).
^ Jean d'Ans, Ellen Lax, Roger Blachnik: Pocket book for chemists and physicists . Springer, 1998, ISBN 3-642-58842-5 , pp. 572 ( limited preview in Google Book search).
↑ This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.
↑ ^a ^b ^c Georg Brauer (Ed.) U. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume III, Ferdinand Enke, Stuttgart 1981, ISBN 3-432-87823-0 , p. 1536.

[Dale_L._Perry-1] Dale L. Perry: Handbook of Inorganic Compounds, Second Edition . Taylor & Francis, 2011, ISBN 1-4398-1462-7 , pp. 279 ( limited preview in Google Book search).

[Lax-2] Jean d'Ans, Ellen Lax, Roger Blachnik: Pocket book for chemists and physicists . Springer, 1998, ISBN 3-642-58842-5 , pp. 572 ( limited preview in Google Book search).

[NV-3] This substance has either not yet been classified with regard to its hazardousness or a reliable and citable source has not yet been found.

[brauer-4] Georg Brauer (Ed.) U. a .: Handbook of Preparative Inorganic Chemistry. 3rd, revised edition. Volume III, Ferdinand Enke, Stuttgart 1981, ISBN 3-432-87823-0 , p. 1536.